CN110995071A - Full-automatic switching device of two hall sensing of group based on rotor position gathers - Google Patents
Full-automatic switching device of two hall sensing of group based on rotor position gathers Download PDFInfo
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- CN110995071A CN110995071A CN201911309857.0A CN201911309857A CN110995071A CN 110995071 A CN110995071 A CN 110995071A CN 201911309857 A CN201911309857 A CN 201911309857A CN 110995071 A CN110995071 A CN 110995071A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/12—Monitoring commutation; Providing indication of commutation failure
Abstract
The invention discloses a full-automatic switching device of double-group Hall sensors based on rotor position acquisition, which comprises: the Hall power supply switching device comprises a first Hall input interface connected with a first group of Hall sensors, a second Hall input interface connected with a second group of Hall sensors, a Hall power supply switching module, a central control module, a first waveform switching module, a second waveform switching module and a Hall output interface, wherein the first Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the first waveform switching module; the second Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the second waveform switching module; the Hall power supply switching module is connected with the central control module; the first waveform switching module and the second waveform switching module are both connected with the Hall output interface, and corresponding waveform signals are connected or disconnected to the Hall output interface under the control of the central control module.
Description
Technical Field
The invention relates to the field of control of direct-current brushless motors (permanent magnet synchronous motors), in particular to a full-automatic switching device of double-group Hall sensors based on rotor position acquisition.
Background
A rotor position sensor of a direct current brushless motor (a permanent magnet synchronous motor) generally adopts a switch type Hall sensor, and the Hall sensor is easy to damage due to overhigh temperature. And the hall sensor of many motors all installs inside the motor, and the operating temperature of motor is very high, leads to hall sensor's damage very easily, and the hall sensor damages the back, and the motor will normally work, and in addition, when the motor work was in heavy load, the heavy load will lead to the temperature of motor inside very high certainly, at this moment, hall sensor's output waveform will be seriously distorted.
At present, the solutions to the above problems of the hall sensor are:
1. hall repair: the direct current brushless motor (permanent magnet synchronous motor) is a three-phase motor generally, and comprises three Hall elements, when one Hall element is damaged, the output waveform of the damaged Hall element is calculated according to the output waveforms of the other two Hall sensors, the rotating speed of the motor, the motor parameters and other data, and the method can only repair the damaged condition of one Hall sensor;
2. the encoder and the rotary transformer replace a Hall sensor: therefore, the problems of the Hall sensor can be solved well, but the encoder and the rotary transformer are expensive and the control technology is complex; in the magnetic encoder which is applied more at present, a main sensing device is still a Hall element, and the Hall sensor problem still exists;
and the main sampling signals of the encoder and the rotary transformer are analog signals, and more strict anti-interference measures and technical means are required for processing the analog signals, so that the manufacturing cost and the manufacturing difficulty are further increased.
Therefore, the present inventors have earnestly demanded to conceive a new technology to improve the problems thereof.
Disclosure of Invention
The invention aims to provide a full-automatic switching device of double groups of Hall sensors based on rotor position acquisition, which can provide hardware and software support for solving the problems of Hall sensor damage and Hall sensor output waveform distortion.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a full automatic switching control equipment of two groups hall sensing based on rotor position is gathered, includes: the Hall power supply switching device comprises a first Hall input interface connected with a first group of Hall sensors, a second Hall input interface connected with a second group of Hall sensors, a Hall power supply switching module, a central control module, a first waveform switching module, a second waveform switching module and a Hall output interface, wherein the first Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the first waveform switching module; the second Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the second waveform switching module; the Hall power supply switching module is connected with the central control module; the first waveform switching module and the second waveform switching module are both connected with the Hall output interface, and corresponding waveform signals are connected or disconnected to the Hall output interface under the control of the central control module.
Preferably, the power supply further comprises a hardware shaping circuit, and the hardware shaping circuit is electrically connected to the first hall input interface, the second hall input interface, the central control module, the first waveform switching module, and the second waveform switching module, respectively.
Preferably, the power supply device further comprises a Hall power supply module which is connected with the Hall power supply switching module.
Preferably, the central control module specifically includes:
the sampling unit is connected with the first Hall input interface, the second Hall input interface and the Hall power supply switching module and is used for acquiring Hall signal waveforms and power supply voltages of the first group of Hall sensors and the second group of Hall sensors;
the logic operation unit is respectively connected with the sampling unit, the failure switching control unit and is used for judging whether the Hall sensor is damaged or not, whether the output waveform of the Hall sensor is distorted or not and whether the power supply voltage is normal or not according to the collected Hall signal waveform and the power supply voltage and then controlling the failure switching control unit and the failure switching control unit to work;
the failure switching control unit is respectively connected with the first waveform switching module, the second waveform switching module and the Hall power supply switching module and is used for switching the damaged Hall sensor and the failed power supply voltage under the control of the logic operation unit;
and the waveform repairing output unit is connected with the first waveform switching module and the second waveform switching module, and is used for repairing distorted waveforms and outputting the distorted waveforms through the first waveform switching module and/or the second waveform switching module.
Preferably, the sampling unit specifically includes:
the first ADC Hall waveform sampling unit is connected with the first Hall input interface and is used for acquiring Hall signal waveforms of the first group of Hall sensors;
the second ADC Hall waveform sampling unit is connected with the second Hall input interface and is used for acquiring Hall signal waveforms of a second group of Hall sensors;
the first ADC Hall power supply sampling unit is connected with the first Hall input interface and the Hall power supply switching module and is used for acquiring power supply voltage of the first group of Hall sensors;
and the second ADC Hall power supply sampling unit is connected with the second Hall input interface and the Hall power supply switching module and is used for acquiring the power supply voltage of the second group of Hall sensors.
Preferably, the failover control unit specifically includes:
the failure waveform switching control subunit is connected with the first waveform switching module and the second waveform switching module and is used for replacing the Hall signal waveform in the damaged Hall sensor with the Hall signal waveform corresponding to the other group of Hall sensors to output when one group of Hall sensors is damaged;
and the failure power supply switching control subunit is connected with the Hall power supply switching module and is used for cutting off the power supply of one group of Hall sensors when detecting that the power supply voltage of the other group of Hall sensors fails, stopping the work of the group of Hall sensors and switching the detection work of the position of the motor rotor to the other group of Hall sensors to finish the detection work.
Preferably, the waveform repairing output unit specifically includes:
the first waveform repairing output subunit is connected with the first waveform switching module and is used for repairing the distorted waveforms of the first group of Hall sensors;
and the second waveform repairing output subunit is connected with the second waveform switching module and is used for repairing the distorted waveforms of the second group of Hall sensors.
Preferably, the central control module is a single chip microcomputer.
By adopting the technical scheme, the invention at least comprises the following beneficial effects:
the full-automatic switching device of the double-group Hall sensors based on rotor position acquisition adopts the double-group Hall sensors, and better solves the problems of Hall sensor damage and Hall sensor output waveform distortion.
Drawings
Fig. 1 is a schematic structural diagram of a full-automatic switching device with two hall sensors based on rotor position acquisition according to an embodiment;
FIG. 2 is a diagram illustrating a fully automatic switching device with two Hall sensors based on rotor position acquisition according to another embodiment;
FIG. 3 is a circuit diagram of a preferred central control module;
FIG. 4 is a circuit diagram of another preferred central control module;
FIG. 5a is a partial circuit diagram of a Hall power supply switching module;
FIG. 5b is a partial circuit diagram of the Hall power supply switching module;
FIG. 6 is a circuit diagram of a first waveform switching module and a second waveform switching module;
FIG. 7 is a circuit diagram of a hardware shaping circuit;
fig. 8 is a circuit diagram of the hall power supply module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 8, the fully automatic switching device of two hall sensors based on rotor position acquisition according to the present invention includes: the Hall power supply switching device comprises a first Hall input interface connected with a first group of Hall sensors, a second Hall input interface connected with a second group of Hall sensors, a Hall power supply switching module, a central control module, a first waveform switching module, a second waveform switching module and a Hall output interface, wherein the first Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the first waveform switching module; the second Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the second waveform switching module; the Hall power supply switching module is connected with the central control module; the first waveform switching module and the second waveform switching module are both connected with the Hall output interface, and corresponding waveform signals are connected or disconnected to the Hall output interface under the control of the central control module.
Preferably, the power supply device further comprises a Hall power supply module which is connected with the Hall power supply switching module.
Preferably, the central control module specifically includes:
the sampling unit is connected with the first Hall input interface, the second Hall input interface and the Hall power supply switching module and is used for acquiring Hall signal waveforms and power supply voltages of the first group of Hall sensors and the second group of Hall sensors;
the logic operation unit is respectively connected with the sampling unit, the failure switching control unit and is used for judging whether the Hall sensor is damaged or not, whether the output waveform of the Hall sensor is distorted or not and whether the power supply voltage is normal or not according to the collected Hall signal waveform and the power supply voltage and then controlling the failure switching control unit and the failure switching control unit to work;
the failure switching control unit is respectively connected with the first waveform switching module, the second waveform switching module and the Hall power supply switching module and is used for switching the damaged Hall sensor and the failed power supply voltage under the control of the logic operation unit;
and the waveform repairing output unit is connected with the first waveform switching module and the second waveform switching module, and is used for repairing distorted waveforms and outputting the distorted waveforms through the first waveform switching module and/or the second waveform switching module.
Preferably, the sampling unit specifically includes:
the first ADC Hall waveform sampling unit is connected with the first Hall input interface and is used for acquiring Hall signal waveforms of the first group of Hall sensors;
the second ADC Hall waveform sampling unit is connected with the second Hall input interface and is used for acquiring Hall signal waveforms of a second group of Hall sensors;
the first ADC Hall power supply sampling unit is connected with the first Hall input interface and the Hall power supply switching module and is used for acquiring power supply voltage of the first group of Hall sensors;
and the second ADC Hall power supply sampling unit is connected with the second Hall input interface and the Hall power supply switching module and is used for acquiring the power supply voltage of the second group of Hall sensors.
Preferably, the failover control unit specifically includes:
the failure waveform switching control subunit is connected with the first waveform switching module and the second waveform switching module and is used for replacing the Hall signal waveform in the damaged Hall sensor with the Hall signal waveform corresponding to the other group of Hall sensors to output when one group of Hall sensors is damaged;
and the failure power supply switching control subunit is connected with the Hall power supply switching module and is used for cutting off the power supply of one group of Hall sensors when detecting that the power supply voltage of the other group of Hall sensors fails, stopping the work of the group of Hall sensors and switching the detection work of the position of the motor rotor to the other group of Hall sensors to finish the detection work.
Preferably, the waveform repairing output unit specifically includes:
the first waveform repairing output subunit is connected with the first waveform switching module and is used for repairing the distorted waveforms of the first group of Hall sensors;
and the second waveform repairing output subunit is connected with the second waveform switching module and is used for repairing the distorted waveforms of the second group of Hall sensors.
Preferably, the central control module is a single chip microcomputer.
In another preferred embodiment, as shown in fig. 2, a hardware shaping circuit (including a first hardware shaping circuit and a second hardware shaping circuit) is further included, and the hardware shaping circuit is electrically connected to the first hall input interface, the second hall input interface, the central control module, the first waveform switching module, and the second waveform switching module, respectively. When the output waveform distortion of the Hall sensor is not serious and within an acceptable range, the output waveform of the Hall sensor is directly shaped and then output to a Hall output interface through a waveform switching circuit.
The invention mainly aims at the problem of the rotor position sensor of the direct current brushless motor (permanent magnet synchronous motor) in the prior art, and better solves the problems of Hall sensor damage and Hall sensor output waveform distortion by adopting double groups of Hall sensors.
The following description takes a three-phase motor as an example: the three-phase motor is provided with three switch Hall sensing elements which respectively correspond to three phases of the motor and are arranged on a motor stator to detect the relative position between a motor rotor and the stator.
The two groups of Hall sensors are adopted, each group of Hall sensors are installed according to the requirements of the motor, when one Hall element in one group is damaged, the MCU detects that the waveform of a normal three-phase Hall signal lacks one phase and only has two phases, the MCU controls the waveform switching circuit to switch the waveform of the corresponding Hall element in the other group of Hall sensors to the Hall output interface to replace the damaged Hall element to output the waveform. The motor faults caused by the damage of the Hall element are greatly reduced.
When the Hall elements of one group of Hall sensors are damaged to cause power supply short circuit of the Hall sensors, the MCU detects that the power supply voltage of the group of Hall sensors is lower than a set threshold value through the ADC sampling circuit, at the moment, the power supply of the group of Hall sensors is cut off, the group of Hall sensors stops working, and the detection of the position of a motor rotor is completed by the other group of Hall sensors.
A hardware shaping circuit: the hardware shaping circuit provides a time sequence of the output waveform of the Hall sensor for the MCU, and directly shapes the output waveform of the Hall sensor and outputs the shaped output waveform to the Hall output interface through the waveform switching module when the output waveform of the Hall sensor is not serious and can be within an acceptable range.
And (3) repairing the waveform of the Hall signal:
1. and (3) repairing the Hall signal waveform when a single Hall is damaged:
when a certain corresponding Hall element in the double-group Hall sensor is damaged, as long as the other two phases of Hall elements are not damaged, the Hall signal waveforms required by the other two phases can be obtained, the Hall signal waveforms are repaired by adopting a Hall signal waveform repairing method, and the repairing method is basically the same as that of a single Hall damage method in the prior art: the MCU obtains (when the hardware shaping circuit is omitted, the MCU directly obtains from the output waveform of the Hall element) a complete Hall time sequence of the other two phases from the hardware shaping circuit, calculates the output waveform of the damaged Hall element according to the output waveforms of the other two Hall sensors, the rotating speed of the motor, the parameter of the motor and other data, and outputs the waveform of a phase of Hall signal of which the Hall element is completely damaged to the Hall output interface through the waveform switching circuit under the control of the MCU.
2. And (3) repairing the waveform of the severely distorted Hall signal:
when the waveform of the Hall sensor is seriously distorted and cannot meet the requirement of motor control, the following method is adopted to repair the waveform output by the Hall sensor and output the waveform to a Hall output interface through a waveform switching circuit:
the MCU obtains a group of distorted Hall signal waveform data according to sampling through the ADC, the distorted Hall signal waveform data is compared with the set threshold value, when the sampling value which does not meet the requirement of the set threshold value (is larger than or smaller than the set threshold value) is within a percentage range (such as 30%), the MCU judges that the ADC sampling value corresponds to the high level or the low level of the Hall signal waveform, so that the distorted Hall signal waveform is repaired, the Hall signal waveform which is synchronous with the output waveform of the Hall sensor is output in the next Hall period, and the repaired Hall signal waveform is output to the Hall output interface through the waveform switching circuit.
The invention is described below with reference to specific circuit diagrams.
In this embodiment, referring to fig. 3 and fig. 4, the central control module is a single chip microcomputer (the connection between the central control module and other modules is shown in the attached drawings, and is not described herein), the type of the single chip microcomputer in the present invention is preferably an ST 32-bit single chip microcomputer (ARM M3 core, main frequency 48MHz) or an 8-bit single chip microcomputer (0851 core, main frequency 64MHz) in the taiwan of the sun, but other single chip microcomputers capable of implementing corresponding functions are not excluded, in addition, this embodiment does not exclude that other discrete electronic components may be employed to implement corresponding functions, and circuit structures designed by the single chip microcomputers of other types or the discrete electronic components are within the protection scope of the present invention.
The singlechip integrates the functions of a sampling unit, a logic operation unit, a failure switching control unit, a waveform restoration output unit and the like, and the singlechip completes corresponding tasks. Referring to fig. 3, an ST 32-bit single-chip microcomputer is taken as an example (for an 8-bit taiwan sunny single-chip microcomputer, see the description in fig. 4, one by one), wherein:
the first ADC Hall waveform sampling unit is connected with the first Hall input interface, corresponding functional pins on the single chip microcomputer are 17/18/19 pins (ADC sampling pins of the single chip microcomputer), the pins are not fixed and unchangeable, any ADC sampling pin of the single chip microcomputer can be known, different ADC sampling pins are connected, and different software defines the ADC sampling pins.
And the second ADC Hall waveform sampling unit is connected with the second Hall input interface, and a corresponding functional pin on the singlechip is 13/14/15 pins. The pins are not fixed and unchangeable, any ADC sampling pin of the singlechip can be known, and different ADC sampling pins are connected and defined by different software.
And the first ADC Hall power supply sampling unit is connected with the first Hall input interface and the Hall power supply switching module, and a corresponding functional pin on the singlechip is 16 pins. The pins are not fixed and unchangeable, any IO pin of the single chip can be known, and different IO sampling pins are connected and defined by different software.
And the second ADC Hall power supply sampling unit is connected with the second Hall input interface and the Hall power supply switching module, and the corresponding functional pin of the second ADC Hall power supply sampling unit on the singlechip is 12 pins. The pins are not fixed and unchangeable, any IO pin of the single chip can be known, and different IO sampling pins are connected and defined by different software.
And the failure waveform switching control subunit is connected with the first waveform switching module and the second waveform switching module, and the corresponding functional pins on the singlechip are pins 2/45/46/27-29. The pins are not fixed and unchangeable, any IO pin of the single chip can be known, and different IO sampling pins are connected and defined by different software.
And the failure power supply switching control subunit is connected with the Hall power supply switching module, and a corresponding functional pin on the singlechip is 25/26 pins. The pins are not fixed and unchangeable, any IO pin of the single chip can be known, and different IO sampling pins are connected and defined by different software.
The first waveform restoration output subunit is connected with the first waveform switching module, and the corresponding functional pins on the singlechip are 41-43 pins; the pins are not fixed and unchangeable, any IO pin of the single chip can be known, and different IO sampling pins are connected and defined by different software.
And the second waveform repairing output subunit is connected with the second waveform switching module, and the corresponding functional pin of the second waveform repairing output subunit on the singlechip is 38-40 pins. The pins are not fixed and unchangeable, any IO pin of the single chip can be known, and different IO sampling pins are connected and defined by different software.
Referring to fig. 5a and 5b, for the hall power supply switching module, a conventional triode switching circuit is adopted, and according to a control signal '12 _ EN X' obtained by the operation of the MCU, the corresponding triode is controlled to be turned on or off, so as to provide power for the hall sensor; the direct current voltage "+ 12V _ OUT X" for supplying power to the Hall sensor is subjected to resistance voltage division to obtain a sampling voltage "12V _ TstX", the "12V _ TstX" is connected to an ADC sampling port of the MCU, the MCU judges whether the Hall sensor has power supply faults or not according to the sampled ADC value, if the "12V _ TstX" is lower than a set threshold value, the MCU judges that the Hall sensor has power supply faults, the MCU controls to stop supplying power to the corresponding Hall sensor through the "12 _ EN X", and a system power supply of the protection device is not influenced by the Hall sensor with the power supply faults.
Referring to fig. 6, the waveform switching circuit of the hall signal functions as: and according to the instruction of MCU operation, switching on or switching off the corresponding Hall element waveform signal to the Hall output interface. The significance of hardware switching is as follows: the required Hall signal waveform is quickly switched and transmitted, so that the transmission delay of the selected Hall signal waveform is avoided. The waveform switching circuit in the embodiment adopts a general 74-series hardware logic chip 74HC126, so that the supply resources of the device are rich, and the cost performance is high. Of course, other types of logic chips are also within the scope of the present application.
Referring to fig. 7, it is a hardware shaping circuit, where P1 is the first hall input interface and P2 is the second hall input interface. The function is as follows: the comparator circuit removes a burr voltage signal generated by the interference of the Hall signal waveform signal, thereby repairing the distortion of the Hall signal. The significance of hardware shaping is as follows: the actual Hall signal waveform is quickly and truly reflected, and the delay of software shaping is avoided. And the hardware shaping circuit is used for buffering the Hall input signal by the resistance-capacitance network and then sending the Hall input signal to the comparator to carry out shaping on the waveform of the Hall signal. The upset threshold voltage of comparator is 1/2 mains voltage 6V, and when the voltage of hall signal was greater than 6V, the comparator output high level 5V, when hall signal waveform voltage was less than 6V, the comparator output low level 0V, received the interference when the hall signal waveform, lead to more the high level voltage that appears to be less than 6V, or low level voltage. And judging whether the Hall signal is seriously distorted or not by software, wherein when the Hall signal is seriously distorted, the main control MCU controls the waveform selection circuit of the Hall signal to close the Hall signal waveform directly output by hardware, and controls the waveform selection circuit of the Hall signal to connect the Hall signal waveform repaired by the software to the Hall output interface.
Referring to fig. 8, the hall power supply module, i.e., the DCDC conversion circuit, converts the high voltage power supply voltage VM for supplying power to the motor into DC12V for supplying power to the hall sensor and DC5V and DC3.3V for supplying power to the MCU and the peripheral electronic circuits.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a full automatic switching control equipment of two groups hall sensing based on rotor position gathers which characterized in that includes: the Hall power supply switching device comprises a first Hall input interface connected with a first group of Hall sensors, a second Hall input interface connected with a second group of Hall sensors, a Hall power supply switching module, a central control module, a first waveform switching module, a second waveform switching module and a Hall output interface, wherein the first Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the first waveform switching module; the second Hall input interface is respectively connected with the Hall power supply switching module, the central control module and the second waveform switching module; the Hall power supply switching module is connected with the central control module; the first waveform switching module and the second waveform switching module are both connected with the Hall output interface, and corresponding waveform signals are connected or disconnected to the Hall output interface under the control of the central control module.
2. The full-automatic switching device of double groups of Hall sensors based on rotor position acquisition as claimed in claim 1, wherein: the intelligent Hall voltage regulator is characterized by further comprising a hardware shaping circuit, wherein the hardware shaping circuit is electrically connected with the first Hall input interface, the second Hall input interface, the central control module, the first waveform switching module and the second waveform switching module respectively.
3. The full-automatic switching device of double groups of Hall sensors based on rotor position acquisition as claimed in claim 1 or 2, wherein: the Hall power supply switching module is connected with the Hall power supply module.
4. The full-automatic switching device of double groups of Hall sensors based on rotor position acquisition as claimed in any one of claims 1-3, wherein said central control module specifically comprises:
the sampling unit is connected with the first Hall input interface, the second Hall input interface and the Hall power supply switching module and is used for acquiring Hall signal waveforms and power supply voltages of the first group of Hall sensors and the second group of Hall sensors;
the logic operation unit is respectively connected with the sampling unit, the failure switching control unit and is used for judging whether the Hall sensor is damaged or not, whether the output waveform of the Hall sensor is distorted or not and whether the power supply voltage is normal or not according to the collected Hall signal waveform and the power supply voltage and then controlling the failure switching control unit and the failure switching control unit to work;
the failure switching control unit is respectively connected with the first waveform switching module, the second waveform switching module and the Hall power supply switching module and is used for switching the damaged Hall sensor and the failed power supply voltage under the control of the logic operation unit;
and the waveform repairing output unit is connected with the first waveform switching module and the second waveform switching module, and is used for repairing distorted waveforms and outputting the distorted waveforms through the first waveform switching module and/or the second waveform switching module.
5. The full-automatic switching device of double groups of Hall sensors based on rotor position acquisition as claimed in claim 4, wherein said sampling unit specifically comprises:
the first ADC Hall waveform sampling unit is connected with the first Hall input interface and is used for acquiring Hall signal waveforms of the first group of Hall sensors;
the second ADC Hall waveform sampling unit is connected with the second Hall input interface and is used for acquiring Hall signal waveforms of a second group of Hall sensors;
the first ADC Hall power supply sampling unit is connected with the first Hall input interface and the Hall power supply switching module and is used for acquiring power supply voltage of the first group of Hall sensors;
and the second ADC Hall power supply sampling unit is connected with the second Hall input interface and the Hall power supply switching module and is used for acquiring the power supply voltage of the second group of Hall sensors.
6. The full-automatic switching device of double groups of Hall sensors based on rotor position acquisition as claimed in claim 4 or 5, wherein the fail-over control unit specifically comprises:
the failure waveform switching control subunit is connected with the first waveform switching module and the second waveform switching module and is used for replacing the Hall signal waveform in the damaged Hall sensor with the Hall signal waveform corresponding to the other group of Hall sensors to output when one group of Hall sensors is damaged;
and the failure power supply switching control subunit is connected with the Hall power supply switching module and is used for cutting off the power supply of one group of Hall sensors when detecting that the power supply voltage of the other group of Hall sensors fails, stopping the work of the group of Hall sensors and switching the detection work of the position of the motor rotor to the other group of Hall sensors to finish the detection work.
7. The full-automatic switching device of double-group Hall sensors based on rotor position acquisition as claimed in any one of claims 4-6, wherein said waveform repairing output unit specifically comprises:
the first waveform repairing output subunit is connected with the first waveform switching module and is used for repairing the distorted waveforms of the first group of Hall sensors;
and the second waveform repairing output subunit is connected with the second waveform switching module and is used for repairing the distorted waveforms of the second group of Hall sensors.
8. The full-automatic switching device of double groups of Hall sensors based on rotor position acquisition as claimed in any one of claims 1-7, wherein: the central control module is a singlechip.
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| CN201911309857.0A CN110995071A (en) | 2019-12-18 | 2019-12-18 | Full-automatic switching device of two hall sensing of group based on rotor position gathers |
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| CN201911309857.0A CN110995071A (en) | 2019-12-18 | 2019-12-18 | Full-automatic switching device of two hall sensing of group based on rotor position gathers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511044A (en) * | 2020-11-12 | 2021-03-16 | 珠海格力电器股份有限公司 | Motor commutation control device and method and motor |
| CN114485738A (en) * | 2022-01-06 | 2022-05-13 | 天津中德应用技术大学 | Double-group Hall sensor device and control method thereof |
-
2019
- 2019-12-18 CN CN201911309857.0A patent/CN110995071A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511044A (en) * | 2020-11-12 | 2021-03-16 | 珠海格力电器股份有限公司 | Motor commutation control device and method and motor |
| CN114485738A (en) * | 2022-01-06 | 2022-05-13 | 天津中德应用技术大学 | Double-group Hall sensor device and control method thereof |
| CN114485738B (en) * | 2022-01-06 | 2024-01-12 | 天津中德应用技术大学 | Double-group Hall sensor device and control method thereof |
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